CN215521621U

CN215521621U - Support structure of high-sensitivity shaft

Info

Publication number: CN215521621U
Application number: CN202121404401.5U
Authority: CN
Inventors: 陈锋; 吴雄; 朱秦叶
Original assignee: Suzhou Tie Jin Science & Technology Corp ltd
Current assignee: Suzhou Tie Jin Science & Technology Corp ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-01-14
Anticipated expiration: 2031-06-23

Abstract

The application relates to a bearing structure of high sensitive axle, the one side of treating the back shaft is established at least to the cover, includes: a bearing outer race; the bearing seat is provided with a mounting groove, and the bearing outer ring is placed in the mounting groove; the adjusting nut is butted with the bearing outer ring so as to adjust the position of the bearing outer ring; a retainer disposed inside the bearing outer ring; the ball bearings are at least partially placed in the retainer and can be in sliding fit with the bearing outer ring and the shaft to be supported; a matching surface in sliding fit with the ball is arranged on one side of the shaft to be supported, and the matching surface gradually approaches to the central axis of the shaft to be supported from one side close to the axis to one side far away from the axis; the inner ring of the bearing is deleted and directly matched with the shaft, so that error accumulation is reduced, the mounting precision and sensitivity of the shaft are improved, the gap is adjusted more conveniently, the concentricity can be better guaranteed, and the friction torque is reduced.

Description

Support structure of high-sensitivity shaft

[ technical field ] A method for producing a semiconductor device

The application relates to a supporting structure of a high-sensitivity shaft, and belongs to the technical field of bearing support.

[ background of the utility model ]

The supporting structure of the shaft is a component for fixing and reducing the load friction coefficient in the mechanical transmission process; on one hand, an error is accumulated between the shaft and the inner ring of the supporting structure and between the inner ring and the balls, on the other hand, the inner ring of the supporting structure rotates at a high speed relative to the shaft supported by the inner ring, and the inner ring generates heat due to friction, so that the fatigue failure of the inner ring is easily caused, the service life of the inner ring is shortened, and the precision and the sensitivity of the shaft are reduced.

[ Utility model ] content

The utility model aims to provide a high-sensitivity shaft support structure which is reasonable in structural design and can improve the shaft mounting precision and sensitivity.

In order to achieve the purpose, the utility model provides the following technical scheme: a high-sensitivity shaft support structure comprising:

a bearing outer race;

the retainer is arranged on the inner side of the bearing outer ring;

the ball is arranged on the retainer and is in sliding fit with the bearing outer ring;

one side of treating the back shaft be provided with ball sliding fit's fitting surface, the fitting surface is from being close to one side of axle center to keeping away from one side of axle center the axis of treating the back shaft is close to gradually.

Further, the retainer is provided with an installation groove, and at least part of the balls are arranged in the installation groove.

Further, the thickness of the holder increases as the diameter of the shaft to be supported decreases.

Furthermore, an included angle exists between the matching surface and the central axis, and the included angle ranges from 9 degrees to 19 degrees.

Further, the included angle is 14 °.

Further, the retainer material is an elastic material.

Furthermore, the support structure of the high-sensitivity shaft further comprises dust covers arranged on two sides of the bearing outer ring and a support piece used for fixing the positions of the dust covers.

Furthermore, be close to treat the back shaft be provided with the through-hole on the shield, the through-hole is used for making treat one side of back shaft stretch into to in the bearing outer lane, in order to with ball cooperation slides.

Further, the support structure of the high-sensitivity shaft further comprises a bearing seat, wherein an installation accommodating groove is formed in the bearing seat, and the bearing outer ring is arranged in the installation accommodating groove.

Further, the support structure of the high-sensitivity shaft further comprises an adjusting nut, and the adjusting nut is in butt joint with the bearing outer ring so as to adjust the position of the bearing outer ring.

The utility model has the beneficial effects that: through with the direct roll cooperation of axle and ball, systematically with the structure integration of bearing and axle together, reduce the error accumulation, when improving axle installation accuracy and sensitivity, it is also more convenient to adjust the clearance, assurance concentricity that can be better.

Through optimal design, the width of the retainer is increased, the outer ring of the bearing, the balls and the retainer can be kept as a whole when no inner ring of the bearing exists, the balls are ensured to be flexible and free in the retainer, the balls can be locked to prevent the balls from sliding out, and the installation difficulty of the balls is reduced. And the dust cover can be made into a totally-enclosed structure on one side, so that the sealing performance is improved, the service life of the whole structure can be prolonged, and the reliability of the sensitivity can be improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a schematic view of a support structure of the high sensitivity shaft of the present invention.

[ detailed description ] embodiments

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, a supporting structure of a high-sensitivity shaft in a preferred embodiment of the present application is sleeved on at least one end of a shaft 1 to be supported. Treat that one side of back shaft is provided with fitting surface 5 with bearing structure complex, this fitting surface 5 is close to this axis of treating back shaft 1 from the one side of being close to the axle center to the one side of keeping away from the axle center gradually, and wherein, the axle center is the axle center of treating back shaft 1. The purpose of this is to: the fixed area of the long-term rolling fit of the matching surface 5 and the supporting structure can generate abrasion, the area of the rolling fit of the supporting structure and the matching surface 5 can be adjusted, on one hand, the accuracy and the reliability of the operation between the supporting structure and the supporting shaft 1 to be supported can be guaranteed, and on the other hand, the friction torque of the supporting structure can be effectively reduced.

Moreover, the matching surface 5 has lower technical requirements on installation between the later-stage supporting structure and the shaft 1 to be supported, and the part processing and the later-stage maintenance are simpler. Wherein, the degree of an included angle between the matching surface 5 and the central axis is set to be 9-19 degrees. Further, in the present embodiment, the angle is set to 14 ° to ensure the accuracy of the fit between the two. Indeed, in other embodiments, the adjustment may be performed according to actual situations, and is not limited herein.

In order to improve the sensitivity and stability of the shaft 1 to be supported during operation, in the present embodiment, the supporting structure is disposed at both ends of the shaft 1 to be supported. Correspondingly, the two sides of the shaft 1 to be supported are provided with matching surfaces 5.

Specifically, this bearing structure includes bearing frame 3, the bearing outer lane 21 of setting in bearing frame 3, the holder 23 of setting in bearing outer lane 21 inboard, and set up on this holder 23 and with bearing outer lane 21 sliding fit's ball 22, wherein, be provided with the storage tank in the middle of the bearing frame 3, be used for accommodating bearing outer lane 21, in order to play the fixed support effect to bearing outer lane 21, prevent that bearing outer lane 21 from taking place the skew with the position of treating support shaft 1 in overall structure operation process, and then reduce overall support structure's precision.

From the above, the bearing outer ring 21, the retainer 23 and the balls 22 in the present application constitute the bearing 2 without the inner ring, and the bearing 2 without the inner ring can make the balls 22 directly contact with the matching surface 5 of the shaft 1 to be supported, so as to improve the operation sensitivity and precision. The bearing outer ring 21 has an outer raceway formed therein, and the cage 23 and the balls 22 are disposed in the outer raceway. And treat fitting surface 5 and the ball 22 direct contact of back shaft 1 to when treating that back shaft 1 rotates, directly will treat the fitting surface 5 of back shaft 1 as the interior raceway of ball 22, compare in treating back shaft and bearing inner race sliding fit in common structure, the bearing inner race is again with ball sliding fit, this bearing structure has effectively reduced the error accumulation, has reduced the friction loss, can obviously improve the installation accuracy, the concentricity and the sensitivity of treating back shaft 1.

At least part of the balls 22 are arranged in the retainer 23 and can be in sliding fit with the bearing outer ring 21 and the shaft 1 to be supported. In the embodiment, the retainer 23 is provided with a plurality of slots, the number of the slots corresponds to the number of the balls 22, that is, one ball 22 is placed in each slot, thereby preventing the balls from running and avoiding the balls 22 from being mutually bitten and abraded. The plurality of slots are uniformly distributed, so that the balls 22 are arranged at a fixed distance, the balls 22 are uniformly distributed along the circumference, and the adverse effect caused by the play of the bearing gap in the operation is reduced.

The thickness of the retainer 23 increases as the diameter of the shaft 1 to be supported decreases to prevent the balls 22 from being disengaged from the retainer 23 in a region where the mating face 5 of the shaft 1 to be supported has a smaller diameter. The integral strength of the retainer 23 is increased, the outer ring 21 of the bearing, the balls 22 and the retainer 23 can be kept as a whole when no inner ring of the bearing exists, the balls 22 can flexibly and freely move in the retainer 23 and cannot slide off the retainer 23, and the mounting difficulty is reduced. In order to further ensure the overall stability of the supporting structure, the supporting structure is further provided with dust covers 24 on two sides of the bearing outer ring 21, and the dust covers 24 are used for preventing dust from entering the bearing outer ring 21 and influencing the matching between the balls 22 and the outer raceway and the inner raceway, so that the operation precision is influenced. Trapezoidal thread openings are formed on both sides of the bearing outer ring 21, and a support 25 is provided between the bearing outer ring 21 and the dust cap 24, and the dust cap 24 can be fixed to the bearing outer ring 21 by fitting into the trapezoidal thread openings on both sides of the bearing outer ring 21. In this embodiment, the supporting member 25 is a sealing ring, which can further increase the sealing performance of the whole structure while playing a role of fixing and supporting.

Since the shaft 1 to be supported needs to be inserted into the bearing 2 without the inner ring to be in sliding fit with the same in this embodiment, a through hole is provided in the dust cap 24 close to the shaft 1 to be supported, and the size of the through hole needs to be large enough to allow the shaft 1 to be supported to freely enter and exit, but the gap between the through hole and the shaft 1 to be supported cannot be too large, so that foreign matters such as dust can be prevented from entering the inside of the bearing through the gap. In addition, because the embodiment cancels the bearing inner ring, the shaft to be supported 1 does not need to completely penetrate the whole bearing 2 without the inner ring, the dust cover 24 far away from the shaft to be supported 1 can be a totally-enclosed structure, the sealing performance of the bearing 2 without the inner ring is improved, the rotation of the balls 22 in a clean space is ensured, and the service life of the whole structure and the reliability of the sensitivity can be prolonged.

The supporting structure further comprises an adjusting nut 4 which is arranged in the accommodating groove of the bearing seat 3 and is in butt joint with the bearing without the inner ring 2 so as to adjust the relative position of the bearing without the inner ring 2 and the shaft 1 to be supported and further adjust the rolling fit area between the ball 22 and the fit surface 5. The adjusting nut 4 is provided with a groove at one side far away from the joint of the bearing without the inner ring 2, and the adjusting nut 4 can be adjusted by using a tool matched with the groove to change the position of the bearing without the inner ring 2 in the mounting groove, so that the matching precision of the bearing without the inner ring 2 and the shaft 1 to be supported can be better adjusted. The adjusting nut 4 can be replaced by other adjusting structures as long as the position of the bearing 2 without the inner ring in the mounting groove can be conveniently and accurately adjusted.

In this embodiment, since the supporting structures are symmetrically disposed on two sides of the shaft 1 to be supported, except for the one side, the other side is the same as the structures of the above components and the positional relationship therebetween, which is not described herein again.

To sum up, this embodiment lets treat that back shaft and ball direct roll cooperation through changing prior art structure, systematically with the structure integration of bearing and axle together, reduces the error accumulation, when improving axle installation accuracy and sensitivity, it is also more convenient to adjust the clearance, assurance concentricity that can be better, reduction friction torque. Through optimal design, the width of the retainer is increased, the outer ring of the bearing, the balls and the retainer can be kept as a whole when no inner ring of the bearing exists, the balls are ensured to be flexible and free in the retainer, the balls can be locked to prevent the balls from sliding out, and the installation difficulty of the balls is reduced. And the dust cover can be made into a totally-enclosed structure on one side, so that the sealing performance is improved, the service life of the whole structure can be prolonged, and the reliability of the sensitivity can be improved.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Claims

1. The utility model provides a supporting structure of high sensitive axle, overlaps at least and establishes the one side of treating the back shaft, its characterized in that includes:

a bearing outer race;

the retainer is arranged on the inner side of the bearing outer ring;

2. The support structure for a high-sensitivity shaft according to claim 1, wherein the retainer is provided with a mounting groove, and at least a part of the balls are disposed in the mounting groove.

3. The support structure of a high-sensitivity shaft according to claim 1, wherein the thickness of the holder increases as the diameter of the shaft to be supported decreases.

4. The support structure for a high sensitivity shaft according to claim 1, wherein an included angle exists between the fitting surface and the central axis, and the included angle ranges from 9 ° to 19 °.

5. The support structure for a high sensitivity shaft according to claim 4, wherein the included angle is 14 °.

6. The support structure for a high sensitivity shaft according to claim 1, wherein the cage material is an elastic material.

7. The support structure for the high-sensitivity shaft according to claim 1, further comprising dust covers disposed on both sides of the bearing outer ring and a support member for fixing the positions of the dust covers.

8. The support structure of claim 7, wherein a through hole is formed in the dust cap close to the shaft to be supported, and the through hole is used for enabling one side of the shaft to be supported to extend into the bearing outer ring so as to be matched with the ball for sliding.

9. The support structure for the high-sensitivity shaft according to claim 1, further comprising a bearing seat, wherein the bearing seat is provided with a containing groove, and the bearing outer ring is arranged in the containing groove.

10. The support structure for the high sensitivity shaft of claim 1, further comprising an adjustment nut that interfaces with the bearing outer race to adjust a position of the bearing outer race.